Speed-governor.



PATENTED NOV. 29, 1904.

H. N. MO'ISINGER.

SPEED GUVERNOR.

APPLICATION FILED $3211.21, 1903.

ga wcwto'c Homer N, Motsinger M En auomujl UNITED STATES PatentedNovember 190 PATENT OEEIcE.

HOMER N. MOTSINGER, OF PENDLETON, INDIANA, ASSIGNOR TO MOTSINGER DEVICEMANUFACTURING COMPANY, OF PENDLE- TON, INDIANA, A CORPORATION OFINDIANA;

SPEED-GOVERNOR.

SPECIFICATION forming part of Letters Patent N 0. 776,028, datedNovember 29, 1904. Application filed September 21, 1903. Serial No.174,044. (No model.)

To all whom, it floaty concern:

Be it known that I. HOMER N. MoTsINsER, a citizen of the United States,residing at Pendleton, in the county of Madison and State of Indiana,haveinvented certain new and useful Improvements in Speed-Governors, ofwhich the following is a specification.

The object of my invention is to provide a simple but effici entspeed-governor for electric generators, especially generators of thetype used for producing the spark for gasengines, the construction beingsuch that the speed of the armature-shaft is controlled by the change ofstrength of the current. It will be understood that the device maybeused for driving other machinery the speed of which is to begoverned'electrically.

The accompanying drawings illustrate my invention.

Figure 1 is a side elevation; Fig. 2, a section on line 2 2 of Fig. 1,and Fig. 3 a partial sectional detail.

In the drawings, 10 indicates an electric generator having an armature11, the shaft of which is provided with asuitabledriving-gear 12.Meshing with gear 12 is a gear 13, rotatable upon shaft 1 1. Secured toshaft 1 1 is a ratchet-wheel 15, provided with a sleeve which isjournaled in a suitable standard forming part of the frame of generator10. Pivoted upon the sleeve of ratchet 15 is a lever 16, carrying pawl17, normally in engagement with the ratchet-wheel, so that areciprocation of lever 16 will drive the ratchet-wheel. Lever 16 alsocarries an electromagnet 18, which is located adjacent pawl 17 and whichis capable of drawing said pawl away from driving engagement with theratchet-wheel. Magnet 18 is in circuit by wires 19 with the generator inany desired manner. In order that the impulses of lever 16 upon theratchetwheel 15 may be more evenly applied to gear 13, the ratchet isconnected to the wheel by means of avolute spring 20, one end of whichis attached to the sleeve of the ratchet-wheel, while the other end isattached to the gear.

By this arrangement the spring 20 must be put under some degree oftension before gear 13 will operate to drive gear 12. By thisarrangement also it is possible to provide for a starting action of thearmature before any movement of lever 16 is had, and this is done in thefollowing manner: Vertically reciprocable within the standard 21 of theframe of the generator 10 is a stem 22, provided at its upper end with abrake-shoe 23, which may be moved into engagement with gear 12. Stem 22may be held in its upper position by any suitable means-as, forinstance, by slot 241 and pin 25. hen the machine is to be stopped, thebrake-shoe 23 is moved up into engagement with the hub of gear 12, sothat spring 20 is wound to a greater degree and is held wound by thebrake-shoe and a contracting of lever 16 with a back-stop 26. \Vhen itis desired to get an additional current from the generator beforestarting lever 16as, for instance, in order to obtain an initial sparkfor a gas-engine before the same has been moved-all that is necessary isto withdraw brake-shoe 23, whereupon the spring 20 will operate torotate the armature suiiiciently to produce the desired current.

In operation pawl 17 is normally in engagement with ratchet-wheel 15, sothat continued reciprocation of the lever 16 will result in a rotationof the armature-shaft. If, however, the speed of the armature becomesgreat enough to produce sufficient current to adequately energize theelectromagnct 18, said magnet will draw the pawl away from the ratchet,and thus allow the continued reciprocation of the lever without drivingthe armature-shaft. So soon as the speed of the armature-shaft dropsbelow a desired point, however, magnet 18 is no longer energizedsufficiently to maintain pawl 17 away from the ratchet-wheel, and ittherefore returns to operating position.

It will be readily understood that the pawland-ratchet mechanism may beof any desired type and that it may be attached directly to thearmature-shaft or separated therefrom by any desired form ofintermediate gearing without departing from my invention.

1 claim as my invention- 1. In a speed-governor, the combination with anelectric generator, of a pawl-andratchet mechanism for driving the same,an electromagnet adapted to separate said pawland-ratchet mechanism, andelectric connections between the generator and the magnet, for thepurpose set forth.

2. In a speed-governor, the combination with an electric generator, of aratchet-wheel, connections between the generator-shaft and said wheel, alever, a pawl carried by said le ver and normally engaging saidratchet-wheel, an electromagnet carried by the lever in position towithdraw the pawl from engagement with the ratchet-wheel, and electricconnections between the generator and said magnet, for the purpose setforth.

3. In a speed -governor, the combination with an electric generator, ofa pawl-andratchet mechanism for driving the same, a spring forming partof the driving connection between the pawl and ratchet and thegenerator, and a brake for holding the generatorshaft against the actionof the spring, Whereby the spring may be held wound, for the purpose setforth.

L. A speed-governor consisting of adriven part and a driving part,separable driving connections between the same consisting in part of aspring through which the driving force is transmitted, a brake forholding the driven part against the action of the spring, anelectromagnet capable of operating upon the separable drivingconnection, and means operated by the driving or driven part forenergizing the magnet sufficiently to operate upon the separable drivingconnection.

5. In a speed-governor, the combination with an electric generator, of aratchet-wheel, a spring attached thereto, connections between saidspring and a generator-shaft, a lever, a pawl carried by said lever andnormally engaging said ratchet-Wheel, an electromagnet carried by thelever in position to withdraw the pawl from engagement with theratchet-wheel, electric connections between the generator and themagnet, and a brake to act upon the generator-shaft in opposition to thespring, for the purpose set forth.

6. in a speed-governor, the combination, with an electric generator, ofa reciprocating driving element, a separable driving connection betweensaid reciprocating driving element and the generator, an clcctromagnetadapted to separate said separable connection, and electric connectionsbetween the generator and the magnet, for the purpose set forth.

In witness whereof I have hereunto set my hand and seal, atlndianapolis, Indiana.

HOMER N. MOTSINGER. [L. s.]

Witnesses:

ARTHUR M. H001), JAMES A. \VALsn.

